Finite Element Model and Its Acoustic Characteristics Analysis of Ultrasonic Liquid Level Transducer

The finite element model(FEM) of the ultrasonic liquid level transducer was developed by ANSYS,and its acoustic characteristic was studied using the harmonic response and transient response technology.Firstly,the acoustic characteristic analysis of ultrasonic liquid level transducer based on finite element theory was described in detail.Solutions to several key problems during finite element modeling were provided.Secondly,the influence of thickness of protection film,material parameter and electrical quality factor on acoustic characteristic was investi-gated.Finally,the experimental results verified the feasibility of the simulating result of resonant frequency and the maximum transmitting voltage response.Therefore,the finite element method is a useful way to analyze the dynamic model of ultrasonic liquid level transducer and optimize such important parameters as the thickness of protection film and electrical quality factor.